03025naa a2200361 a 450000100080000000500110000800800410001902400520006010000220011224501510013426000090028552019200029465000210221465000140223565000100224965000170225965000110227665300270228765300220231465300520233665300220238865300290241065300160243965300090245570000200246470000200248470000280250470000190253270000170255170000190256870000180258777300580260521322682021-09-30       2021    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1007/s00284-021-02540-72DOI1 aGALEANO, R. M. S.  aPotential of bacterial strains isolated from ironstone outcrops bromeliads to promote plant growth under drought condition.h[electronic resource]  c2021  aPlant growth-promoting bacteria (PGPB) are bacteria that have mechanisms that facilitate plant growth in stress conditions such as drought. The objective of this study was to characterize bacterial strains isolated from bromeliads roots in ironstone outcrops (Urucum Residual Plateau, Mato Grosso do Sul, Brazil) for plant growth-promoting under drought conditions. Firstly, we screened isolates with the presence of 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity. Then, all isolates were tested for tolerance to drought, exopolysaccharides (EPS) production, indole-3-acetic acid (IAA)-producing abilities, phosphate and zinc solubilization, production of catalase and hydrolytic enzymes (amylase, cellulase, and protease). Germination assay and a pot experiment with maize plants submitted to well-watered and drought conditions were performed with the strains most promising (VBN11 and VBE23). Briefy, Bacillus cereus VBE23 showed in vitro higher ACC deaminase activity (3.83 and 2.52µmol α-KB mg−1 h−1 in non-drought and drought conditions, respectively), tolerance to drought, EPS production and other mechanisms of plant growth promotion: solubilization of phosphate and zinc, ammonia production, catalase activity and production of hydrolytic enzymes (amylase, cellulase, and protease). Inoculation of strain VBE23 in maize seeds submitted to drought conditions showed higher germination concerning uninoculated seeds and inoculated with VBN11. Also, the results indicated that the isolate VBE23 provided higher values of fresh and dry biomass compared to the control of uninoculated treatment and inoculated with VBN11 under drought conditions. This is the frst report on the PGPB from ironstone outcrops of Urucum Residual Plateau, Mato Grosso do Sul, Brazil. Thus, this bacterial isolate could be used as a strategy for the facilitation of plant growth in drought environments  aSoil inoculation  aBactéria  aFungo  aInoculação  aPlanta  aAmbientes ferruginosos  aBacterial strains  aBactérias promotoras de crescimento de plantas  aCepas bacterianas  aFerruginous environments  aInoculation  aPGPB1 aGODOY, F. M. de1 aDURÊ, L. M. M.1 aFERNANDES JUNIOR, P. I.1 aBALDANI, J. I.1 aPAGGI, G. M.1 aZANOELO, F. F.1 aBRASIL, M. S.  tCurrent Microbiologygv. 78, n.1, p. 2741-2752, 2021.